Progress report :)
 

Truck factory Electrical - FAIL (no power to battery terminals on the fuse box, dome light, or outer cab light. Faulty ground suspected)
TPI Sensory - PASS
TPI Relay - ROYAL FAILURE (I have no idea what I messed up here, but the burnoff relay, power relay, and fuel pump relay all kick in at the same time, no matter which relay you attempt to energize. Any relay provides power to all systems)

I'll tear the relay harness out tommorow to figure out what I messed up, and post another progress report when all three systems are passes :D